Travel to Blackthorn City. The city is accessible near the end of the game, shortly after you defeat all of the Team Rocket members in Mahogany Town. The eighth and final gym is located in the city.
Enter the house to the south of the PokeCenter. A man will be standing near the end of a table in the house.
Talk to the man at the table. He is known as the Move Deleter. After an initial dialogue sequence, a menu will appear with your available Pokemon listed.
Select the Pokemon you want to make forget an HM move. The Pokemon's skills will appear.
Select the HM move you want to delete. The Move Deleter will delete the HM move.
Yes you can trade them over but they won't be able to forget the HM moves until you find the move deleter.
you cant
move deleter person.
There's a move deleter in blackthorn city he can remove hm moves.
Fly is an HM move - HM moves can't be forgotten by replacing it with a new one. Instead, you have to go to the move deleter to forget Fly, as is the case with all HM moves.
Go to the Move Deleter in Canalaeve City. He will make your Pokemon forget any moves and is the only way to forget HM moves. If you want a move back (not including TMs/Hms) go to the Move Relearner in Pastoria City with a Heart Scale, which can be found underground.
There is a move deleter who can make pokemon forget HM moves.
take the Pokemon to a guy in lilycove city and he makes them forget
thats inpossible it can forget HMs only if you use a cheat
you go to the guy in cancave city in the house
He lives in one of the houses in Blackthorn City.
Find the move deleter.